2002 Chevrolet Trailblazer: engine knocking or ticking

Filed Jul 31, 2017 · Electrical, Lights · OH

I pulled into my garage and shut my truck off but my doors wouldn't unlock. Then it started making funny ticking sounds and all my lights inside started flicking and my windows all rolled up and wouldn't go back down so I could get out. After about 20 minutes or so I turned it back on and was finally able to get my door unlocked to get out. Now when I touch anything my other windows go up and my seat starts to move on its own. My driver's window is stuck up and won't come back down. I have 5 kids and can not chance something happening and us not being able to get out safely.

Filed Dec 20, 2012 · Engine, Transmission · 100,100 miles · WA

I started my trailblazer and let it warm for a few minutes. The truck idle was louder then normal but did not knock or miss. I put the truck into drive and pulled out of my driveway. As I was driving down the street I noticed the rpms shoot up and the truck slow, I pulled over and put it into park, the truck idled loudly. I put the truck into drive again and the RPM would rise with little power to the wheels. I nursed it up to highway speed and at higher speeds around 60 the problem seems to not be there. The truck continues to do this in the lower gears and at lower speeds. I notice the oil pressure goes up when this happens and I worry of doing more damage. I have already had a wiper module replaced that was recalled but never replaced before the vehicle was sold to me.

Filed Jun 13, 2008 · Engine · 72,000 miles · NY

Tl*the contact owns a 2002 chevrolet trailblazer. The contact stated that her engine has been ticking and making whining noises during acceleration, and performing very poorly. The service engine soon light illuminated intermittently. The contact took her vehicle to her local mechanic and they stated that the engine needed to be repaired. She was able to locate a dealer's special policy related to service bulletin number 060603. The dealer and the manufacturer informed her that a diagnostic would be needed to determine the cause of the failure, which would cost approximately $2,800. The contact stated that she takes her vehicle to the dealer for routine maintenance as specified by the manufacturer. The vehicle has not been repaired. The failure mileage was 72,000 and current mileage was 75,000.

Filed Nov 8, 2005 · Electrical, Transmission · 46,000 miles · SC

Feb. 04 46,000 miles repaired transmission, 2nd gear and reverse broken, was told by a gm transmission repairman that this is very common problem, sometimes it takes just one fix, some trailblazers have required many repairs (also problem on envoy), being a straight 6, the transmission cannot handle the torque causing the gears in the transmission to break; vehicle cut off on me at a red light for unknown reason; dash gauges and radio would not come on when car started, drove for a few miles, cut car off, restarted and all came back on;radio facing becomes extremely hot to touch at times and flickers on and off; obnoxious squeak in the front end of car, taken to mechanics with no reason why; ticking noise while running; other than the transmission, no action has been taken due to reading the filed complaints of others with no real successful results or answers from dealers. I hate this car!!

Filed Dec 13, 2004 · Transmission · AK

When turning on the vehicle it accelerated uncontrollably. While driving at low speeds consumer heard a loud knocking noise coming from the front. Vehicle was taken to the dealer for inspection, and mechanic determined that the transfer case needed to be replaced, and replaced it twice. However, the problem recurred.

Filed Nov 10, 2004 · Electrical, Engine · 125,000 miles · LA

2002 trailblazer acted like transmission going out, took to dealer they upgraded computer. Front right low beam wired burned and melted, took to dealer they wanted to charge 250.00 plus labor for light assembly when all it needed was a piggy plug, bought plug at napa and fixed myself. Never have had two back lights working at same time... Cant take to dealer to get the recall work because it seems that these vehicles are using a "weak" oil pump and my trailblazer has been in shop for last month or more waiting to be fixed. The weak oil pump caused damage to rod bearings, main bearings, and crankshaft. Gm says out of warranty and my customer service specialist said "I'm sorry" about 10 times but she was still closing my folder and marking dissatisfied. She can't help me because I'm out of warranty. I hate this vehicle. I have found quite a few recalls but can't do most because its in the shop. I never got any recall notices.

Filed Oct 15, 2004 · Engine · 63,456 miles · IN

Engine slippage, then started making a knocking noise. We took it to a private mechanic that informed us of a recall notice by general motors on the cylinder sleeve and that the VIN of our 2002 trailblazer fell within the parameters of the recall notice. We had the vehicle towed to the dealership, who informed us that the tie rod went through the engine block. We are in the process of having a new engine installed. General motors will only pay for 30% of the repairs even though the engine has been well cared for, has 60,000 miles on it and mechanics have stated that the cylinder sleeve may have contributed to the problem.

Filed Dec 2, 2003 · Engine · 15,500 miles · NJ

G.m. Sent notices to costumers in june 2003 of possible engine cylinder problems in early 2002 chevrolet trailblazers. This pboblem is quite serious and has in the pistons, develop a knock or slap.this can and does cause damage to cyl. Walls and other internal parts. G.m.has offered to replace pistons only.this is not what should be done in a vehicle with only 17,700 miles.itis my feeling the engine should be replaced .g.m. Does not.I have spoken to chevrolet customer and was told only pistons would be replaced.this would involve nearly if not completly rebuilding the engine.this is not acceptable to me as I belive I an intitled to have the engine of a new vehicle not a rebuilt engine acceptable for an aged vehicle.

Filed Nov 20, 2003 · Electrical, Engine · MI

There is a knock in the engine of my vehicle. The new engine with the new design of the pistons straight layout is making my engine have a continuous knock. My four wheel drive does not work due to a electrical short in the dash harness. Wire harness is located behind dash. Tail lights constantly burning out.

Filed Aug 3, 2003 · Airbags, Electrical · MO

Dont know where to start. Squeaking noise when going over bumps (sounds like it is coming from suspension). Metal grinding noise in brakes, ticking noise from engine, seat belt and airbag lights have come on for no reason, rear latch has come open while driving, tail lights and brake lights burning out freqently, transmission was slipping on take off, no cause found in the several times it has been taken in for this. Now my transmission is out. Just happened yesturday. Don't feel like I can blame the dealership after reading all the complaints. I think the fault lies on the shoulders of gm.

Filed Jul 9, 2003 · Engine · 18,500 miles · MI

Engine knock and rattle on cold start, worsens when loaded (in gear). After several minutes, knocking diminishes. Coincides with intermittent cold engine stall with no ses light set.

Filed Feb 27, 2002 · Brakes, Engine · NY

While traveling at 70 MPH, driver heard a ticking noise, suddenly engine died. Driver had to force vehicle to the side of the road. *ak it was discovered that the engine had blown, the 4wd has also been repaired twice and the front brakes shake when applied, mileage to date 12,000-8/02.